EP0561258A1 - Procédé pour engendrer des signaux MPC (modulation à phase continue) - Google Patents

Procédé pour engendrer des signaux MPC (modulation à phase continue) Download PDF

Info

Publication number
EP0561258A1
EP0561258A1 EP93103786A EP93103786A EP0561258A1 EP 0561258 A1 EP0561258 A1 EP 0561258A1 EP 93103786 A EP93103786 A EP 93103786A EP 93103786 A EP93103786 A EP 93103786A EP 0561258 A1 EP0561258 A1 EP 0561258A1
Authority
EP
European Patent Office
Prior art keywords
pulses
cpm
data sequence
binary data
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93103786A
Other languages
German (de)
English (en)
Other versions
EP0561258B1 (fr
Inventor
Paul-Walter Prof. Dr.-Ing. Baier
Peter Dipl.-Phys. Jung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infineon Technologies AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0561258A1 publication Critical patent/EP0561258A1/fr
Application granted granted Critical
Publication of EP0561258B1 publication Critical patent/EP0561258B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2014—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying

Definitions

  • the invention relates to a method according to the preamble of patent claim 1.
  • the object of the invention is to provide a method for generating bandpass CPM signals with the modulation index 1/2 that is simple to implement.
  • the bandpass CPM signals with modulation index 1/2 are formed directly in a single step by a linear superimposition of real pulses.
  • the invention is based on the fact that the complex envelope of CPM signals can be represented with a linear superimposition of pulses.
  • the introduction of differential coding and the selection of a suitable carrier frequency when carrying out the low-pass bandpass transformation are of essential importance in the method according to the invention.
  • MSK Minimum Shift Keying
  • each element u N of the data follows a ⁇ u N ⁇ movement of the phase angle in accordance with a weighted and delayed version of a phase function 4) (t).
  • the phase function 4) (t) fulfills the relationships and connects the constant phase profiles (2) and (3) with a continuous curve (cf. Proakis' cited book: pages 148 to 186).
  • the individual properties of a specific CPM are determined by the integer L and by the course of the phase function ⁇ (t) in the time interval O ⁇ t ⁇ LT.
  • the signal s (t) has the center frequency
  • the representation according to equation (7) is advantageous in connection with the signal generation in the transmitter and the signal evaluation in the receiver.
  • the usual digital process for generating MSK signals is cumbersome because it consists of two steps, namely the digital generation of the complex envelope and the modulation of the carrier by the complex envelope.
  • a fairly simple modulator can be realized based on equation (7).
  • This modulator essentially consists of a memory in which the pulse Do (t) is stored according to equation (6).
  • the MSK signal s (t) is achieved directly by reading out time-delayed replicas Do (t - NT) of the pulse Do (t), which are weighted with the continuously valid binary data element a N of the data sequence ⁇ a N ⁇ of the equation (4) .
  • the representation according to equation (7) offers further advantages. Based on this signal representation, the response of the radio channel to the pulse Do (t) is a sufficient basis for an equalization algorithm. Another advantage is that the representation according to equation (7) can be used in functional tests of manufactured MSK modulators. For this purpose it must be examined whether the output signal of this modulator contains the pulse Do (t) in an undistorted form.
  • the invention is based on the knowledge that not only for MSK signals s (t) but also for any CPM signals with the modulation index 1/2, a direct representation by linear superimposition of real pulses similar to equation (7) is possible. As a result, the previously mentioned advantages of such a linear representation are no longer limited to the case of the MSK.
  • the invention is based on the fact that the complex envelope of CPM signals can be represented by a linear superposition of pulses (Laurent, PA: “Exact and Approximate Construction of Digital Phase Modulations by Superposition of Amplitude Modulated Pulses (AMP)", in IEEE Trans., Vol. COM-34, 1986, pages 150 to 160).
  • This type of signal representation is decisively further developed by the invention, the key points being the introduction of differential transcoding and the selection of a suitable frequency f c of the carrier when a low-pass band-pass transformation is carried out.
  • the determination of the weights of the pulses D K (t) is derived below.
  • the time range t 0 is to be considered in the following.
  • the complex envelope of a CPM signal with the modulation index 1/2 based on the binary data sequence ⁇ UN ⁇ , cf. Equation (1), and the phase function ⁇ (t), cf. equations (2) and (3) takes the following form:
  • the CPM signal takes the following form according to equation (16):
  • the pulses D K (t) are based on the pulses C K (t), cf. Equation (17).
  • the pulses C K (t) are determined by the phase function ⁇ (t).
  • the initial conditions for calculating the pulses C K (t) are the functions and the binary representation of the index K. With the function S (t) defined in equation (19) and the binary sets ⁇ K introduced in equation (20), the following pulses C K (t) result:
  • the pulses C K (t) calculated according to the equations (21) can be used in the equations (17) to represent the pulses D K (t).
  • the representation of a CPM signal according to equation (18) can be regarded as the basis of the circuit shown in block diagram form in FIG. 1 for carrying out the method according to the invention.
  • the modulator shown is clocked at a rate 1 / T.
  • the differential recoder 1 encodes the original binary data sequence ⁇ u N ⁇ so that the binary data sequence ⁇ a N ⁇ is obtained therefrom, see equations (1) and (4).
  • the elements a N , a N - 1 , a N - 2 , a N - 3 and a N - 4 of the data sequence ⁇ a N ⁇ are formed in the shift register 2, which are used to generate the weights of the pulses D K (t) in the product formers 3 are required.
  • Each clock pulse causes the memories 4 to output the pulses D K (t), which are multiplied in the multiplier 5 by their suitable weights.
  • the output signals of the multipliers 5 are summed in the sum generator 6.
  • the final CPM signal s (t) then arises at the output of the totalizer 6.
  • the function of the recoder 1 is listed in the following table, ie the transition from ⁇ u N ⁇ to ⁇ a N ⁇ .
  • Fig. 11 shows a GMSK signal which was generated using the binary data sequence ⁇ a k ⁇ of the table shown previously and the pulses Do (t) and D 1 (t).
  • Fig. 12 shows a GMSK signal generated using the data sequence ⁇ u k ⁇ from the above-mentioned table and the phase function ⁇ (t). 13, the signals according to FIGS. 11 and 12 are superimposed, so that it can be seen that the signals for the time range t ⁇ 4T are identical. It can be seen from this that the validity of equation (18) has been preserved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
EP93103786A 1992-03-18 1993-03-09 Procédé pour engendrer des signaux MPC (modulation à phase continue) Expired - Lifetime EP0561258B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208728 1992-03-18
DE4208728 1992-03-18

Publications (2)

Publication Number Publication Date
EP0561258A1 true EP0561258A1 (fr) 1993-09-22
EP0561258B1 EP0561258B1 (fr) 2001-08-01

Family

ID=6454397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103786A Expired - Lifetime EP0561258B1 (fr) 1992-03-18 1993-03-09 Procédé pour engendrer des signaux MPC (modulation à phase continue)

Country Status (3)

Country Link
EP (1) EP0561258B1 (fr)
AT (1) ATE203865T1 (fr)
DE (1) DE59310198D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044691A1 (fr) * 1997-03-27 1998-10-08 Siemens Aktiengesellschaft Procede de transmission et systeme pour formes de signaux de type gmsk
WO1999038297A1 (fr) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Mise en forme d'impulsions destinee a compenser la distorsion introduite un composant
WO1999038298A1 (fr) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Mise en forme des impulsions en fonction d'un schema de modulation
US6385256B1 (en) 1997-12-11 2002-05-07 Nokia Telecommunications Oy Method and arrangement for signal modulation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11424970B1 (en) 2021-08-30 2022-08-23 Rockwell Collins, Inc. Converting GMSK impulse responses and optimal sequences

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FREQUENZ Bd. 45, Nr. 7-8, Juli 1991, BERLIN, DE Seiten 186 - 191 JUNG P. ET AL.: 'Linearisierung der prim{r nichtlinearen Modulationsart MSK - eine anschauliche Darstellung' *
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS Bd. 10, Nr. 8, Oktober 1992, NEW YORK, US Seiten 1236 - 1242 JUNG P. AND BAIER P. W.: 'On the Representation of CPM Signals by Linear Superposition of Impulses in the Bandpass Domain' *
IEEE TRANSACTIONS ON COMMUNICATIONS Bd. 34, Nr. 2, Februar 1986, NEW YORK, US Seiten 150 - 160 LAURENT P. A.: 'Exact and Approximate Construction of Digital Phase Modulations by Superposition of Amplitude Modulated Pulses (AMP)' *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044691A1 (fr) * 1997-03-27 1998-10-08 Siemens Aktiengesellschaft Procede de transmission et systeme pour formes de signaux de type gmsk
US6385256B1 (en) 1997-12-11 2002-05-07 Nokia Telecommunications Oy Method and arrangement for signal modulation
WO1999038297A1 (fr) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Mise en forme d'impulsions destinee a compenser la distorsion introduite un composant
WO1999038298A1 (fr) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Mise en forme des impulsions en fonction d'un schema de modulation
GB2349317A (en) * 1998-01-21 2000-10-25 Nokia Mobile Phones Ltd Pulse shaping which compensates for component distortion
GB2349318A (en) * 1998-01-21 2000-10-25 Nokia Mobile Phones Ltd Pulse shaping according to modulation scheme
US7054658B1 (en) 1998-01-21 2006-05-30 Nokia Mobile Phones Limited Pulse shaping according to modulation scheme

Also Published As

Publication number Publication date
DE59310198D1 (de) 2001-09-06
EP0561258B1 (fr) 2001-08-01
ATE203865T1 (de) 2001-08-15

Similar Documents

Publication Publication Date Title
DE2018885C3 (de) Adaptiver Entzerrer für eine digitale Datenempfangseinrichtung
DE2648273C2 (de) Einseitenband-Verfahren zur Informationsübertragung und Vorrichtung zur Durchführung des Verfahrens
DE4343510C2 (de) Verfahren und Vorrichtung zum Erzeugen des Basisbandsignals eines mehrstufigen überlagerten amplitudenmodulierten Signals
DE2540473B2 (de) Modulations- und Filtervorrichtung
DE3202005A1 (de) Daten-modulator-sender
DE3312849A1 (de) Sender zum ausstrahlen fm-modulierter signale
DE2255821C3 (de) Adaptiver Transversalentzerrer
EP0250924A1 (fr) Procédé de transmission de données numériques utilisant la modulation de phase continue
DE2625038B2 (de) Konverter zur Konvertierung einer Folge digitaler binarer Signale in eine Folge mehrphasig phasenmodulierter Tragerimpulse bzw. umgekehrt
DE2628581B2 (de) Schaltung zur wiedergewinnung von taktsignalen mit veraenderlicher frequenz fuer einen digitaldatenempfaenger
DE1922224A1 (de) Adaptiver Entzerrer
DE10124782A1 (de) Übermittlung und Erkennung der Modulationsart in digitalen Kommunikationssystemen mittels eines der Trainingssequenz aufgeprägten Phasenrotationsfaktors
DE112009001199T5 (de) Modulator mit doppelter Funktion
DE2656975A1 (de) Deltamodulationsverfahren
EP0561258B1 (fr) Procédé pour engendrer des signaux MPC (modulation à phase continue)
DE2850555C2 (fr)
DE2317597C3 (de) Verfahren und Schaltungsanordnung zum Entzerren eines nach Übertragung mittels Phasenmodulation mit linearen Verzerrungen behafteten Signals vor der Demodulation
DE1185646B (de) Sende- und Empfangsschaltung fuer die UEbertragung binaer codierter Daten oder nach einem Mehrpegelcode codierter Daten
DE2850718A1 (de) Sich selbst anpassender entzerrer fuer eine elektrische nachrichtenuebertragungsstrecke
EP0254846B1 (fr) Procédé et dispositif de transmission de données
DE3730399A1 (de) Verfahren und vorrichtung zur uebertragung eines digitalsignals
DE1297648B (de) Verfahren und Schaltungsanordnung zur UEbertragung von binaer-kodierten Daten durch Anwendung von Frequenzmodulation
DE1462622A1 (de) Fernmeldeanlage
DE3015218C2 (fr)
DE2020805B2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE DK ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19940207

17Q First examination report despatched

Effective date: 19990903

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: INFINEON TECHNOLOGIES AG

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE DK ES FR GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20010801

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20010801

REF Corresponds to:

Ref document number: 203865

Country of ref document: AT

Date of ref document: 20010815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59310198

Country of ref document: DE

Date of ref document: 20010906

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20011002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20011101

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20011101

EN Fr: translation not filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020331

EN Fr: translation not filed

Free format text: BO 01/52 PAGES: 283, IL Y A LIEU DE SUPPRIMER: LA MENTION DE LA NON REMISE. LA REMISE EST PUBLIEE DANS LE PRESENT BOPI.

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: *INFINEON TECHNOLOGIES A.G.

Effective date: 20020331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040510

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050228

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050311

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060309

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060309

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060331